Resilient roll and process for producing such a roll

Abstract

Roll and process for producing roll including a hard roll core, and a resilient covering layer, including a matrix material, located on an outer side of the hard roll core. The matrix material includes a soft metal. The process includes producing a matrix material comprising a soft metal, and applying the soft metal matrix material onto an outer side of the hard roll core, thereby forming the resilient covering layer.

What is claimed is:  
     
       1. A roll comprising: 
       a hard roll core; and  
       a resilient covering layer, comprising a matrix material, located on an outer side of said hard roll core,  
       wherein said matrix material comprises a soft metal and said resilient covering layer further comprises fillers embedded in the matrix material that have a higher resilience than said metal forming said matrix material.  
     
     
       2. The roll in accordance with  claim 1 , wherein said roll is adapted for smoothing paper webs, 
       wherein said hard roll core comprises metal, and  
       wherein said resilient covering layer further comprises filler embedded in said matrix material.  
     
     
       3. The roll in accordance with  claim 1 , wherein said metal melts at temperatures below about 600° C. 
     
     
       4. The roll in accordance with  claim 1 , wherein said metal melts at temperatures of about 480° C. or less. 
     
     
       5. The roll in accordance with  claim 1 , wherein said metal is zirconium. 
     
     
       6. The roll in accordance with  claim 1 , wherein a thermal conductivity of said metal forming said matrix material is higher than a thermal conductivity of said fillers. 
     
     
       7. The roll in accordance with  claim 1 , wherein a coefficient of thermal expansion of said metal forming said matrix material is essentially as high as a coefficient of thermal expansion of said roll core. 
     
     
       8. The roll in accordance with  claim 1 , wherein said resilient covering layer further comprises fillers embedded in said matrix material, said filler comprising aramide. 
     
     
       9. The roll in accordance with  claim 8 , wherein said fillers are formed as synthetic particles. 
     
     
       10. The roll in accordance with  claim 9 , wherein said synthetic particles comprise at least one of fibers and rovings. 
     
     
       11. The roll in accordance with  claim 9 , wherein at least some of said fibers are aligned in an axial direction. 
     
     
       12. The roll in accordance with  claim 11 , wherein a predominant portion of said fibers is aligned in the axial direction. 
     
     
       13. The roll in accordance with  claim 9 , wherein that at least some of said fibers are aligned in a radial direction. 
     
     
       14. The roll in accordance with  claim 13 , wherein a predominant portion of said fibers is aligned in the radial direction. 
     
     
       15. The roll in accordance with  claim 9 , wherein at least some of said fibers are aligned randomly. 
     
     
       16. The roll in accordance with  claim 9 , wherein said fibers are arranged one of in one fibre layer and in radially successive fibre layers. 
     
     
       17. The roll in accordance with  claim 1 , wherein said resilient covering layer further comprises additional fillers comprising at least one of fibers and powder arranged in said metal forming said matrix material. 
     
     
       18. The roll in accordance with  claim 17 , wherein said additional fillers comprise at least one of quartz, PTFE, carbon fibers, and glass fibers.